Swim among millions of stingless jellyfish.
Mushroom-shaped jungle islets, UNESCO-listed.
Cross one of the Sahara's emptiest expanses.
Hundreds of mantas feed in this tiny bay during the monsoon plankton blooms.
Swim at the very edge of Victoria Falls.
The largest reef in the northern hemisphere: nurse sharks and rays at Hol Chan, turtles and 500 species of fish.
Trail beneath cliff-built Dogon villages and ancient Tellem granaries.
Drift between the American and Eurasian tectonic plates in gin-clear glacial water.
Fringing reef in Western Australia where whale sharks cruise close to shore.
Walk the cliff path linking five pastel fishing villages above the Ligurian Sea
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